"Molten Oreo" Is act when man do it in the butt when the person recieving anal sex has bad case od diarhea. Then the man after cuming proceeds to give a rim job. When the person with diarhea can't hold it anymore he/she gives the man a "Molten Oreo".
Oh man I received such a delicious Molten Oreo I can still taste it after 3 days!